Iuliana Roata has been named the new principal at Stamford's Roxbury Elementary School, replacing Mark Bonasera.

"It became more of a friendship than just writing back and forth," said fifth grader Trinity Danzy of her bond with her high school pen pal.

The P/B ratio shows how a stock's market price compares to its book value. It helps gauge whether a stock is undervalued or overvalued relative to its net assets.